wel I had query that how does link juice from home page gets distributed if v hav 3 links from home page to a single particular page within a website wid same anchor text? does it gets divided into three or only once?
Good question, nobody really knows because the search engines keep very quiet about that sort of thing.
As a rule of thumb we can assume that "link juice" is divided equally between every link on the page (probably not accurate but good enough for our purposes here). What happens after that is the problem. With Google every "share" allocated to a nofollow link is then thrown away. Now, does your second page get three shares or one share?
The answer to that probably varies between search engines. Personally I would assume the worst case, which is that one share is passed and the other two shares are discarded. Forget PR sculpting, build your navigation in a way that makes sense for visitors.
Brain fuzzy this late at night, but I seem to recall some page rank discussions here at WW and a few Google announcements that link juice only goes so far from Matt Cutts, and that it is not equally distributed. As I don't worry about page rank (a bogus cap and tax...er...trade charade) I don't lose sleep over it. Not until there's tangible evidence it means anything to Google these days (which is does not). Meanwhile I am courting Bing and in my personal experience am better for it.
There was a discussion by a reputable SEO at PubCon last year that seems to say that the first link on a page hold's the most weight (specifically with regard to anchor text) and that multiple links on one page to the same URL doesn't compound the value (meaning 3 thinks pass the same juice as 1, 10 links will pass the same as 1, etc). Hope this helps..
So if it's counted just once, the next logical part of the question would be: counted once at random, only the first time it's found on a page, and first time found in the code or visually on the page. I'm sure like most people here the links in content appear first in navigation, where they have pretty poor anchor text compared to the link in-content. Do we have anything else to go on?